Extraction of the proton mass radius from the vector meson photoproductions near thresholds

doi:10.1103/PhysRevD.103.L091501

	Extraction of the proton mass radius from the vector meson photoproductions near thresholds
	Wang, Rong 1,2; Kou, Wei 1,2; Xie, Ya-Ping 1,2; Chen, Xurong 1,2,3
刊名	PHYSICAL REVIEW D
	2021-05-11
卷号	103 期号:9 页码:5
ISSN号	2470-0010
DOI	10.1103/PhysRevD.103.L091501
通讯作者	Wang, Rong(rwang@impcas.ac.cn) ; Kou, Wei(kouwei@impcas.ac.cn) ; Xie, Ya-Ping(xieyaping@impcas.ac.cn) ; Chen, Xurong(xchen@impcas.ac.cn)
英文摘要	We present an analysis of the proton mass radius by studying the t dependence of the differential cross sections of the vector meson photoproductions near the thresholds. At low energy, the photoproduction of a quarkonium off the proton is connected to the scalar gravitational form factor of the proton, which is sensitive to the proton mass distribution from the quantum chromodynamics trace anomaly. Under an assumption of the scalar form factor of dipole form, the proton mass radius is extracted via the nearthreshold photoproduction data of J/psi, phi, and omega vector mesons. The average value of the proton mass radius is estimated to be root < R-m(2)> = 0.67 +/- 0.03 fm, with the dipole cutoff m(s) = 1.01 +/- 0.04 GeV.
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDB34030301] ; National Natural Science Foundation of China[12005266]
WOS关键词	GENERALIZED PARTON DISTRIBUTIONS ; ENERGY-MOMENTUM TENSOR ; FORM-FACTORS ; NUCLEON
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000649439500009
资助机构	Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/137322]
专题	中国科学院近代物理研究所
通讯作者	Wang, Rong; Kou, Wei; Xie, Ya-Ping; Chen, Xurong
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 3.South China Normal Univ, Inst Quantum Matter, Guangdong Prov Key Lab Nucl Sci, Guangzhou 510006, Peoples R China
推荐引用方式 GB/T 7714	Wang, Rong,Kou, Wei,Xie, Ya-Ping,et al. Extraction of the proton mass radius from the vector meson photoproductions near thresholds[J]. PHYSICAL REVIEW D,2021,103(9):5.
APA	Wang, Rong,Kou, Wei,Xie, Ya-Ping,&Chen, Xurong.(2021).Extraction of the proton mass radius from the vector meson photoproductions near thresholds.PHYSICAL REVIEW D,103(9),5.
MLA	Wang, Rong,et al."Extraction of the proton mass radius from the vector meson photoproductions near thresholds".PHYSICAL REVIEW D 103.9(2021):5.